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Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Condensed Consolidated Statements of Comprehensive Loss
Net loss	$ (6,526)	$ (11,418)	$ (15,442)	$ (21,164)
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on available-for-sale debt securities	(384)	(105)	(1,544)	251
Reclassification of realized (gain) loss on available-for-sale debt securities to earnings	(31)	28	7	(19)
Foreign currency translation adjustments	(512)	24	(3,666)	20
Other comprehensive income (loss)	(927)	(53)	(5,203)	252
Total comprehensive loss	$ (7,453)	$ (11,471)	$ (20,645)	$ (20,912)

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